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X-RAY DIFFRACTION
Materials and Methods page
1BWI
  •   Crystallization Hide
    Crystallization Experiments
    Method drops under paraffin oil
    pH 4.7
    Temperature 291.0
    Details A SOLUTION CONTAINING 40 MG/ML OF LYSOZYME (SIGMA L-6876, BATCH NUMBER, LOT 65H7025, IE A DIFFERENT SIGMA SAMPLE TO THE EXPERIMENTS DESCRIBED ABOVE) IN 10 MM SODIUM CITRATE BUFFER PH 4.7 WAS MIXED IN AN EPPENDORF TUBE WITH EQUAL VOLUMES OF 12 % SODIUM CHLORIDE (BDH). THE MIXTURE WAS FILTERED THROUGH A 0.22 UM FILTER AND 8 UL DROPS WERE MANUALLY DISPENSED UNDER PARAFFIN OIL USING A GILSON MICRO PIPPETTE. OVER 20 IDENTICAL DROPS WERE SET UP AND, WITHIN A WEEK, SINGLE CRYSTALS TYPICALLY MEASURING 0.5 X 0.4 X 0.3 MM WERE OBTAINED IN MOST OF THE DROPS. CRYSTALLISATION TOOK PLACE AT A TEMPERATURE OF 18 - 20 C., drops under paraffin oil, temperature 291K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 79.23 α = 90
    b = 79.23 β = 90
    c = 37.94 γ = 90
     
    Space Group
    Space Group Name:    P 43 21 2
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type RIGAKU RAXIS IIC
     
    Diffraction Radiation
    Monochromator CARBON
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Type RIGAKU RU200
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Resolution(High) 1.7
    Resolution(Low) 99
    Number Reflections(Observed) 12081
    Percent Possible(Observed) 85.5
    R Merge I(Observed) 0.077
    Redundancy 6.1
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.8
    Resolution(Low) 20.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 10979
    Percent Reflections(Observed) 94.1
    R-Factor(Observed) 0.171
    R-Work 0.171
    R-Free 0.206
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Mean Isotropic B Value 22.9
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 1.216
    x_bond_d 0.007
    x_angle_deg 1.579
    x_dihedral_angle_d 22.2
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1001
    Nucleic Acid Atoms 0
    Heterogen Atoms 0
    Solvent Atoms 92
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Refinement X-PLOR 3.1
     
    Software
    refinement X-PLOR version: 3.1
    data reduction SCALEPACK
    data collection DENZO